
def add(a,b):
    return a+b
def subtract(a,b):
    return a-b
def multiply(a,b):
    return a*b
def divide(a,b):
    return a/b


#测试内容
print("这是模块的模块==>__name__:",__name__)
print(add(1,2))
print(subtract(1,2))
print(multiply(1,2))

import my_package as mp
print(mp.module1.add(1,2))
print(mp.module2.subtract(1,2))
